Table 2. Summary of the dosimetric parameters calculated for highly ventilated regions, poorly ventilated regions, and total lung for two patient sub-groups: One with radiation pneumonitis of ≥Grade 2 and the other with radiation pneumonitis of Grade 1.
| Radiation Pneumonitis | Dosimetric | Poorly ventilated regions |
Highly ventilated regions |
Total lung |
|---|---|---|---|---|
| Parameter | (0–30%)Average, SD | (70–100%) Average, SD | (0–100%) Average, SD | |
| ≥ Grade 2 (n = 10) | Mean Dose (Gy) | 19.1±16.3 | 15.6±7.5 | 14.4±6.4 |
| V 20 (%) | 29.6±15.8 | 20.9±17.5 | 20.0±12.0 | |
| V 5 (%) | 44.8±19.3 | 37.5±16.3 | 38.9±8.9 | |
| < Grade 2 (n = 30) | Mean Dose (Gy) | 9.8±6.7 | 12.3±7.3 | 11.7±11.2 |
| V 20 (%) | 6.6±6.6 | 10.4±12.2 | 9.4±10.0 | |
| V 5 (%) | 24.4±16.8 | 26.4±13.0 | 25.6±11.8 |